There is a discord group in the official 1337x subreddit, the user was just a vip user, not a staff/moderator and he deleted comments after posting a malware in order to keep the release alive. Maybe he was trusted before posting it, and 1337x staff are a few people (lately even less) so he wasn't blocked quickly. Nothing more. I hope 1337x will make an announcement. The user who posted malware was under a blue nikname:

• Black - admin
• Green - moderator
• Blue - vip
• Yellow - uploader
• Red - trial uploader
• Grey - user

There wasn't any member of the staff that was helping the vip user to delete comments. He was just deleting comments under its own post by himself.